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Oral Microbiome and Probiotics: Can 'Good Bacteria' Help Prevent Cavities and Gum Disease?

October 15, 2025
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Posted By: Dr. Sarah Barr
Dentist performing routine dental exam with mirror and scaler at a modern dental office in Brandon,

 

The word “probiotics” probably makes you think about your digestive health, but the truth is that probiotics can be helpful in other areas, including your mouth. Your oral microbiome is the active bacteria that live in your mouth; it’s made up of both good and bad bacteria. According to the National Library of Medicine, keeping a balance between these types may contribute to improved oral health.

Let’s explore some of the uses and benefits of oral probiotics so you can make an informed decision.

What Are Oral Probiotics?

When you use a probiotic rinse or lozenge, it supports your oral flora by introducing more of the good bacteria; these good bacteria compete with the bad bacteria in the following ways:

  • They can inhibit harmful microbe growth.
  • They can form a protective layer on your teeth.
  • They can support your immune system.
  • They can balance your mouth’s pH levels.

 

Exploring the Potential Benefits of Oral Probiotics

Both probiotic rinses and lozenges have numerous potential benefits for your oral and overall health.

Here’s what they can do:

  • Reduce bad breath — Probiotics may be able to fight odor-causing bacteria, leading to fresher breath.
  • Fight cavities — Probiotics could inhibit certain cavity-causing bacteria in your mouth, improving your oral health.
  • Improve gum health — Probiotics could reduce gum irritation and inflammation, reducing your gingivitis and periodontitis symptoms.
  • Strengthen immune system — Probiotics could improve your microbiome, decreasing your chances of oral infections.

What Is Still Unknown?

There are some limitations to what probiotics can do, and some uncertainties exist about their long-term oral health benefits.

When considering a probiotic rinse or lozenge, keep these things in mind:

  • Only certain probiotic strains can effectively colonize in your mouth.
  • Probiotics need to come into direct contact with the inside of your mouth, so liquids and lozenges are the best option.
  • Consistent use may be the key to unlocking the benefits of probiotics.
  • You shouldn’t replace regular dental hygiene, such as brushing and flossing, with probiotics. They should be used in conjunction with your daily routine.
  • If you have a compromised immune system, speak with your dentist about whether oral probiotics are right for you.

Questions About Your Oral Health in Brandon, FL?

To learn more about how to keep your teeth and gums healthy, our caring dental team will happily assist you! At Walker & Barr, DMD, our goal is to help every patient achieve the best oral health possible.

If you’d like to schedule an appointment, please reach out to us at (813) 689-5928.

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